Posts Tagged ‘gas’

Volcanoes A Beginners Guide by Rosaly LopesVolcanoes: A Beginner’s Guide, Rosaly Lopes (Oneworld 2010)

My first introduction to volcanoes was fictional: Willard Price’s Volcano Adventure (1956), which stands out in his Adventure series because it centres on something inanimate, not on animals like lions or gorillas or elephants. This book by the NASA scientist Rosaly Lopes is factual but equally enjoyable. And some of it would fit well into Volcano Adventure anyway:

[V]olcanoes come with different sizes, shapes and temperaments. It is fascinating to study what causes these differences and understand that, while generalizations are possible, each volcano has its distinct quirks, just like people. We could also compare volcanoes to cats: with few exceptions, they spend most of their lives asleep. (ch. 1, “What are volcanoes?”, pg. 1)

When a volcano wakes, look out. They’ve slain cities, devastated eco-systems and shaped landscapes. They’re also shaped cultures. Like a thunderstorm or earthquake, an erupting volcano raises a big question in the minds of human observers: What caused something so powerful and impressive? Our explanations began with myth and moved to science. And they moved a long time ago: the ancient philosopher Anaxagoras “proposed that volcanic eruptions were caused by great winds within the Earth, blowing through narrow passages” (pg. 5) and becoming hot by friction. Two-and-a-half millennia later, scientists are plotting “silica (SiO2) content” against “alkali content” as they classify “different volcanic rocks” (ch. 2, “How volcanoes erupt”, pg. 15).

But Anaxogaras’ principles are still at work: seek the explanation in mindless mechanism, not in supernatural mind. Classification is another essential part of science. In vulcanology, the scientific study of volcanoes, magmas are classified and so are eruptions, from subdued to spectacular: Icelandic and Hawaiian are on the subdued side, Peléean, Plinian and Ultraplinian on the spectacular, with Strombolian and Vulcanian in between. Some eruptions are easy to understand and investigate. Some are difficult. Volcanoes can be as simple or complicated as their names. Compare Laki, on Iceland, with Eyjafjallajökull, also on Iceland.

Laki is an example of an eco-slayer:

Although the eruption did not kill anyone directly, its consequences were disastrous for farmland, animals and humans alike: clouds of hydrofluoric acid and sulphur dioxide compounds caused the deaths of over half of Iceland’s livestock and, ultimately, the deaths – mostly from starvation – of about 9,000 people, a third of the population. The climatic effects of the eruption were felt elsewhere in Europe; the winter of 1783-4 as noted as being particularly cold. (ch. 3, “Hawaiian and Icelandic eruptions: fire fountains and lava lakes”, pg. 31)

Lopes goes on to look at city-slayers like Mount Pelée and Vesuvius, but they can be less harmful to the environment. A spectacular eruption can be over quickly and release relatively little gas and ash into the atmosphere. And death-dealing is only half the story: volcanoes also give life, because they enrich the soil. They enrich experience too, not just with eruptions but with other phenomena associated with vulcanism: geysers, thermal springs, mudpools and so on.

And that’s just the planet Earth. Lopes also discusses the rest of the solar system, from Mercury, Venus and Mars to the moons of gas giants like Jupiter and Saturn. The rocky planets have volcanoes more or less like those on earth, but the moons of the gas giants offer an apparent paradox: cryovolcanoes, or “cold volcanoes”, which erupt ice and water, not superheated lava. On Neptune’s moon Triton, whose surface is an “extremely cold” -235ºC, cryovulcanism may even involve frozen nitrogen. The hypothesis is that under certain conditions, it’s heated by sunlight, turns into a gas and “explodes” in the “near-vacuum of Triton’s environment” (ch. 11, “The exotic volcanoes of the outer solar system”, pg. 138).

Hot or cold, big or small, on the earth or off it, volcanoes are fascinating things and this is an excellent introduction to what they do and why they do it.


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Trench by Stephen BullTrench: A History of Trench Warfare on the Western Front, Stephen Bull (Osprey Publishing 2010)

This is a detailed history of trench warfare in World War One, from the early days of improvisation and error to the later sophistication of flame-throwers, phosgene and tanks. One thing that stayed constant was slaughter: the war involved hundreds of highly intelligent men devising ever better ways of mincing, mashing and maiming bodies and minds. Hundreds of thousands of men in the trenches then put those ideas into operation:

The infantry battalion soon included grenades of many types, new machine guns and snipers, catapults and light mortars. The Engineers adopted gas, flame and other examples of frightfulness. … For some this was the start of a new age, when, as Ernst Jünger put it, “the spirit of the machine” took possession of the battlefield and new leaders were born. (Conclusion, pg. 255)

But artillery was the biggest killer, responsible for “two-thirds of all deaths and injuries on the Western Front”, Stephen Bull concludes in chapter one, which examines “The Armies of 1914 and the Problem of Attack”. That problem arose from an important and overlooked point he makes in the introduction: “trenches were designed to, and did, save lives” (pg. 8). Wars are won more by ending lives, not saving them, so each side sought to overcome the protection offered by trenches to the other side. Gas was one solution; tunnelling to lay explosives was another. And the tank was, in a way, a mobile trench. It wasn’t decisive in this war, but it was indirectly responsible for one of the war’s most memorable photographs: New Zealand troops “holding a German ‘T-Gewehr’ anti-tank rifle” in a “captured German emplacement near Grévillers, 25 August 1918” (ch. 9, “The Tank”, pg. 215).

New Zealanders with T-Gewehr anti-tank rifle

New Zealanders with T-Gewehr anti-tank rifle

The grins and the gun are included here with many other photos and illustrations: churned mud, stagnant pools and tree-stumps (pg. 99); a “male Mark IV tank ‘Hyacinth’” stuck in a ditch (pg. 201); a “German NCO and his Soldatenkunst [trench-art]” on brass shell cases (pg. 88); laughing British troops wearing captured German helmets (pp. 146-7); a “louse hunt” conducted by “Württembergers of the 123rd Grenadier Regiment ‘König Karl’” (pg. 189); a “bullet-riddled steel loophole plate” (pg. 155); a canvas-and-steel “dummy tree” used for artillery observation (pg. 198); and gas-masks for horses and dogs and a “gas-proof pigeon box incorporating air filters” (pg. 137). Bull discusses the Western Front from all three perspectives – Anglophone, Francophone, Teutophone – and describes how the three groups both fought and thought in distinct ways:

Interestingly many pictures of German soldiers in the latrines exist, whilst British sensibilities make this subject something of a rarity. George Coppard of the Machine Gun Corps – no stranger to hardship or death – professed himself shocked by such exhibitions. (ch. 1, “Trenchtown”, pp. 76-7)

The three groups looked distinct too: the faces and expressions differ both between the big nations and within them. But one photo could be of any nationality and from almost any war of the past hundred years: “Snipers of the US 168th Infantry” wearing camouflage hoods and garments “in May 1918” (pg. 163). They look both anonymous and ominous and though the photo is black-and-white, it might have been taken in the Second World War or in Iraq or Afghanistan in the twenty-first century. What happened in the First World War carries on now and learning about any war tells you something about all wars. But trench-warfare will probably never return on this scale and if you want to understand what it was like, this is a good guide.

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The End of Night by Paul BogardThe End of Night: Searching for Natural Darkness in an Age of Artifical Light, Paul Bogard (Fourth Estate 2013)

Night + light = bad. Interesting subject + poor prose = disappointing. And those are the formulae that govern this book. Artificial light destroys one of the most beautiful and inspiring sights in nature: the night sky. In proper darkness, we can see thousands of stars with the naked eye. In a brightly lit city, we’re lucky to see any at all. And we certainly don’t see any unless we’re looking straight up. That’s why artifical light is like amplified music and traffic noise: it’s one of the great barbarisms of modern life. So I was glad to come across this book.

I wasn’t glad for long, because it’s over-written and dull, despite the interesting topics it covers: the biology and ecology of darkness, the wonders of astronomy, sleep and dreams, the journey from candles to gas to electricity, from night as source of mystery and beauty to night as perpetual light. Paul Bogard “studied Literature and Environment” at the University of Nevada and now “teaches writing at James Madison University” in Virginia. And it shows. If he were British, he’d be a Guardianista. And sure enough:

That we don’t notice glaring lights anymore has direct ramifications for light pollution, of course, but in terms of safety and security, because we are so used to bright lighting, we won’t notice if anything out of the ordinary is taking place. (ch. 7, “Light That Blinds, Light That Enlightens”, pp. 75-6)

I’d like to agree with his argument that light at night doesn’t deter crime as most people imagine it does, but he makes a glaring oversight:

Asked in one study what factors deterred them from targeting a house, criminals listed “belief that house is occupied,” “presence of alarms or CCTV/camera outside the property,” and, to a lesser extent, the “apparent strength of doors/window locks.” Nowhere did they mention the presence of lighting. (Ibid., pg. 76)

Light and its absence are implicit in “belief that house is occupied”, aren’t they? And how good is “CCTV/Camera” when it’s dark? That’s why I gave up this book by chapter 7, which was actually the third chapter in the book. That was a nice touch, paying tribute to the “amateur astronomer John Bortle”, who created a “scale on which he described various levels of dark skies, ranking them 9 to 1, brightest to darkest” (“Introduction”, pg. 9). So the deeper you get into the book, the darker it gets, until the final chapter, chapter 1, is about “The Darkest Places”.

I’d like to have got that far and I wish Paul Bogard well in his campaign for less light and more night. But on this first attempt, at least, I got bored and gave up.

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